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Protein Structures and Oligomeric States

Enter a protein name, UniProt accession or PDB ID. Name searches ask you to confirm the protein identity before related structures are queried.

Current Protein Identity：P0A881 New Search
27PDB entries
35Biological assembly
72chain/assembly records
Main Difference Dimensions in This Set
Different construct Different mutation/modification Different assembly state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics

Difference tags compare only the current result set; every original PDB and assembly record remains separate.

Related-Structure Differences

Each row represents one biological assembly in one PDB entry; multiple monomers of the same protein are listed separately.

PDB Entry Assembly / Oligomeric State Construct Mutations and Modifications Ligands, Ions and Non-polymers Experimental Method Experimental Conditions Structure Quality
1CO0 NMR STUDY OF TRP REPRESSOR-MTR OPERATOR DNA COMPLEX Deposited 1999-05-30 Assembly 1 Protein–DNA Homooligomer；Protein × 2 PDB declaration: tetrameric（4） Consistent with all polymers
Chain A 1–107（107 aa）
Chain B 1–107（107 aa）
Not recorded TRP TRYPTOPHAN × 2 SOLUTION NMR
NMR measurement conditions pH 5.7
Resolution not provided
1JHG TRP REPRESSOR MUTANT V58I Deposited 1996-07-19 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 7–107（101 aa）
Mutation：CHAIN A, V58I PO4 PHOSPHATE ION × 2 TRP TRYPTOPHAN × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 5；HANGING DROP VAPOR DIFFUSION 2.0 M SODIUM PHOSPHATE, PH 5.0 600 MM AMMONIUM CHLORIDE 5 MM L-TRYPTOPHAN, vapor diffusion - hanging drop
Resolution 1.30 Å R-free 0.172
1MI7 Crystal Structure of Domain Swapped trp Aporepressor in 30%(v/v) Isopropanol Deposited 2002-08-22 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain R 1–107（107 aa）
Not recorded IPA ISOPROPYL ALCOHOL × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；295 K；100 mM Na HEPES, 100 mM sodium chloride, 30%(v/v) isopropanol, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 295K
Resolution 2.50 Å R-free 0.288
1RCS NMR STUDY OF TRP REPRESSOR-OPERATOR DNA COMPLEX Deposited 1995-05-12 Assembly 1 Protein–DNA Homooligomer；Protein × 2 PDB declaration: tetrameric（4） Consistent with all polymers
Chain A 3–106（104 aa）
Chain B 3–106（104 aa）
Not recorded TRP TRYPTOPHAN × 2 SOLUTION NMR mmCIF provides none of the parsed conditions Resolution not provided
1TRO CRYSTAL STRUCTURE OF TRP REPRESSOR OPERATOR COMPLEX AT ATOMIC RESOLUTION Deposited 1992-08-30 Assembly 1 Protein–DNA Homooligomer；Protein × 2 PDB declaration: tetrameric（4） Consistent with all polymers
Chain A 0–107（108 aa）
Chain C 0–107（108 aa）
Not recorded TRP TRYPTOPHAN × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION；VAPOR DIFFUSION
Resolution 1.90 Å
1TRO CRYSTAL STRUCTURE OF TRP REPRESSOR OPERATOR COMPLEX AT ATOMIC RESOLUTION Deposited 1992-08-30 Assembly 2 Protein–DNA Homooligomer；Protein × 2 PDB declaration: tetrameric（4） Consistent with all polymers
Chain E 0–107（108 aa）
Chain G 0–107（108 aa）
Not recorded TRP TRYPTOPHAN × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION；VAPOR DIFFUSION
Resolution 1.90 Å
1TRR TANDEM BINDING IN CRYSTALS OF A TRP REPRESSOR/OPERATOR HALF-SITE COMPLEX Deposited 1993-10-21 Assembly 1 Protein–DNA Homooligomer；Protein × 4 PDB declaration: hexameric（6） Consistent with all polymers
Chain A 1–107（107 aa）
Chain B 1–107（107 aa）
Chain G 1–107（107 aa）
Chain H 1–107（107 aa）
Not recorded TRP TRYPTOPHAN × 4 X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 2.40 Å
1TRR TANDEM BINDING IN CRYSTALS OF A TRP REPRESSOR/OPERATOR HALF-SITE COMPLEX Deposited 1993-10-21 Assembly 2 Protein–DNA Homooligomer；Protein × 4 PDB declaration: hexameric（6） Consistent with all polymers
Chain D 1–107（107 aa）
Chain E 1–107（107 aa）
Chain J 1–107（107 aa）
Chain K 1–107（107 aa）
Not recorded TRP TRYPTOPHAN × 4 X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 2.40 Å
1WRP FLEXIBILITY OF THE DNA-BINDING DOMAINS OF TRP REPRESSOR Deposited 1987-12-01 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain R 1–107（107 aa）
Not recorded TRP TRYPTOPHAN × 2 X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 2.20 Å
1WRS NMR STUDY OF HOLO TRP REPRESSOR Deposited 1995-05-12 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain R 3–107（105 aa）
Chain S 3–107（105 aa）
Not recorded TRP TRYPTOPHAN × 2 SOLUTION NMR mmCIF provides none of the parsed conditions Resolution not provided
1WRT NMR STUDY OF APO TRP REPRESSOR Deposited 1995-05-12 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain R 3–107（105 aa）
Chain S 3–107（105 aa）
Not recorded No recorded non-water small molecule SOLUTION NMR mmCIF provides none of the parsed conditions Resolution not provided
1ZT9 E. coli trp repressor, tetragonal crystal form Deposited 2005-05-26 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 1–107（107 aa）
Chain B 1–107（107 aa）
Not recorded SO4 SULFATE ION × 4 TRP TRYPTOPHAN × 2 X-RAY DIFFRACTION
X-ray crystallization conditions pH 5.6；294 K；2.8 M ammonium sulfate plus 50 mM sodium, potassium phosphate buffer, 5 mM L-tryptophan, VAPOR DIFFUSION, HANGING DROP, temperature 294K, pH 5.60
Resolution 2.00 Å R-free 0.219
1ZT9 E. coli trp repressor, tetragonal crystal form Deposited 2005-05-26 Assembly 2 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain D 1–107（107 aa）
Chain E 1–107（107 aa）
Not recorded SO4 SULFATE ION × 4 TRP TRYPTOPHAN × 2 X-RAY DIFFRACTION
X-ray crystallization conditions pH 5.6；294 K；2.8 M ammonium sulfate plus 50 mM sodium, potassium phosphate buffer, 5 mM L-tryptophan, VAPOR DIFFUSION, HANGING DROP, temperature 294K, pH 5.60
Resolution 2.00 Å R-free 0.219
1ZT9 E. coli trp repressor, tetragonal crystal form Deposited 2005-05-26 Assembly 3 Protein homooligomer Homooligomer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain A 1–107（107 aa）
Chain B 1–107（107 aa）
Chain D 1–107（107 aa）
Chain E 1–107（107 aa）
Not recorded SO4 SULFATE ION × 8 TRP TRYPTOPHAN × 4 X-RAY DIFFRACTION
X-ray crystallization conditions pH 5.6；294 K；2.8 M ammonium sulfate plus 50 mM sodium, potassium phosphate buffer, 5 mM L-tryptophan, VAPOR DIFFUSION, HANGING DROP, temperature 294K, pH 5.60
Resolution 2.00 Å R-free 0.219
1ZT9 E. coli trp repressor, tetragonal crystal form Deposited 2005-05-26 Assembly 4 Protein homooligomer Homooligomer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain A 1–107（107 aa）
Chain B 1–107（107 aa）
Chain D 1–107（107 aa）
Chain E 1–107（107 aa）
Not recorded SO4 SULFATE ION × 8 TRP TRYPTOPHAN × 4 X-RAY DIFFRACTION
X-ray crystallization conditions pH 5.6；294 K；2.8 M ammonium sulfate plus 50 mM sodium, potassium phosphate buffer, 5 mM L-tryptophan, VAPOR DIFFUSION, HANGING DROP, temperature 294K, pH 5.60
Resolution 2.00 Å R-free 0.219
1ZT9 E. coli trp repressor, tetragonal crystal form Deposited 2005-05-26 Assembly 5 Protein homooligomer Homooligomer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain A 1–107（107 aa）
Chain B 1–107（107 aa）
Chain D 1–107（107 aa）
Chain E 1–107（107 aa）
Not recorded SO4 SULFATE ION × 8 TRP TRYPTOPHAN × 4 X-RAY DIFFRACTION
X-ray crystallization conditions pH 5.6；294 K；2.8 M ammonium sulfate plus 50 mM sodium, potassium phosphate buffer, 5 mM L-tryptophan, VAPOR DIFFUSION, HANGING DROP, temperature 294K, pH 5.60
Resolution 2.00 Å R-free 0.219
2OZ9 E. coli TRP holorepressor, orthorhombic crystal form Deposited 2007-02-25 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain R 2–108（107 aa）
Not recorded NA SODIUM ION × 2 SO4 SULFATE ION × 2 TRP TRYPTOPHAN × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION；pH 5；298 K；crystallization conditions: 2.5 M sodium phosphate, 0.6 M ammonium chloride, 2.5 mM L-tryptophan. Prior to data collection the crystal was equilibrated to 2.4 M ammonium sulfate, 0.4 M sodium chloride, 2.4 mM L-tryptophan, 50 mM sodium acetate., pH 5.0, VAPOR DIFFUSION, temperature 298K
Resolution 1.65 Å
3SSW E. coli trp aporepressor Deposited 2011-07-08 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain N 2–108（107 aa）
Chain R 2–108（107 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.5；294 K；Hampton Research Crystal Screen condition #6: 30% (w/v) PEG 4000, 200 mM MgCl2, 100 mM Tris HCl pH 8.5, VAPOR DIFFUSION, HANGING DROP, temperature 294K
Resolution 1.67 Å R-free 0.219
3SSX E. coli trp aporeporessor L75F mutant Deposited 2011-07-08 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain N 2–108（107 aa）
Chain R 2–108（107 aa）
Mutation：L75F Mutation：L75F TAM TRIS(HYDROXYETHYL)AMINOMETHANE × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.5；294 K；Hampton Research Crystal Screen condition #6: 30% (w/v) PEG 4000, 200 mM MgCl2, 100 mM Tris HCl pH 8.5, VAPOR DIFFUSION, HANGING DROP, temperature 294K
Resolution 1.58 Å R-free 0.218
3WRP FLEXIBILITY OF THE DNA-BINDING DOMAINS OF TRP REPRESSOR Deposited 1987-12-01 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 1–107（107 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 1.80 Å
6EJW Tryptophan Repressor TrpR from E.coli wildtype with Indole-3-acetic acid as ligand Deposited 2017-09-23 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 1–108（108 aa）
Chain B 1–108（108 aa）
Not recorded IAC 1H-INDOL-3-YLACETIC ACID × 4 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5.5；293 K；0.1 M Bis-Tris pH 5.5 2 M Ammonium sulfate
Resolution 1.99 Å R-free 0.243
6EJW Tryptophan Repressor TrpR from E.coli wildtype with Indole-3-acetic acid as ligand Deposited 2017-09-23 Assembly 2 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain C 1–108（108 aa）
Chain D 1–108（108 aa）
Not recorded IAC 1H-INDOL-3-YLACETIC ACID × 3 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5.5；293 K；0.1 M Bis-Tris pH 5.5 2 M Ammonium sulfate
Resolution 1.99 Å R-free 0.243
6EKP Tryptophan Repressor TrpR from E.coli variant T44L T81M S88Y with Indole-3-acetic acid as ligand Deposited 2017-09-26 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 1–108（108 aa）
Chain B 1–108（108 aa）
Not recorded IAC 1H-INDOL-3-YLACETIC ACID × 2 P3G 3,6,9,12,15-PENTAOXAHEPTADECANE × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 6.5；293 K；0.05 Calcium Chloride 0.1M Bis-Tris pH 6.5 30% PEG 550 MME
Resolution 1.46 Å R-free 0.190
6ELB Tryptophan Repressor TrpR from E.coli variant M42F T44L T81M N87G S88Y with Indole-3-acetic acid as ligand Deposited 2017-09-28 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 1–108（108 aa）
Chain B 1–108（108 aa）
Not recorded IAC 1H-INDOL-3-YLACETIC ACID × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.5；293 K；25% PEG 3350 0.17M KCl 3% D-(+) Trehalose dihydrate
Resolution 1.44 Å R-free 0.193
6ELF Tryptophan Repressor TrpR from E.coli variant M42F T44L T81I S88Y with Indole-3-acetic acid as ligand Deposited 2017-09-28 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 1–108（108 aa）
Chain B 1–108（108 aa）
Not recorded IAC 1H-INDOL-3-YLACETIC ACID × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 6.5；293 K；0.1M MES pH 6.5 12 % PEG 20000
Resolution 1.83 Å R-free 0.217
6ELG Tryptophan Repressor TrpR from E.coli variant M42F T44L T81I S88Y with Indole-3-acetonitrile Deposited 2017-09-28 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 1–108（108 aa）
Chain B 1–108（108 aa）
Not recorded 3BO 1H-indol-3-ylacetonitrile × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.5；293 K；0.2 M Ammonium Formate 20% PEG 3350
Resolution 1.38 Å R-free 0.176
6ENI Tryptophan Repressor TrpR from E.coli variant T44L S88Y with Indole-3-acetic acid as ligand Deposited 2017-10-04 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 1–108（108 aa）
Chain B 1–108（108 aa）
Not recorded IAC 1H-INDOL-3-YLACETIC ACID × 2 EDO 1,2-ETHANEDIOL × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 4；293 K；0.1 M MMT buffer pH 4 25 % PEG 1500
Resolution 1.10 Å R-free 0.175
6ENN Tryptophan Repressor TrpR from E.coli variant T44L T81M N87G S88Y with Indole-3-acetic acid as ligand Deposited 2017-10-05 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 1–108（108 aa）
Chain B 1–108（108 aa）
Not recorded IAC 1H-INDOL-3-YLACETIC ACID × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5；293 K；0.1 M MMT buffer pH 5 25 % PEG 1500
Resolution 1.17 Å R-free 0.180
6F7F Tryptophan Repressor TrpR from E.coli with 3-Indolepropionic acid Deposited 2017-12-08 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 4–106（103 aa）
Chain B 4–106（103 aa）
Not recorded IOP INDOLYLPROPIONIC ACID × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.5；293 K；0.2 M Calcium Chloride 0.1 M HEPES pH7.5 30% PEG 4000
Resolution 2.13 Å R-free 0.229
6F7F Tryptophan Repressor TrpR from E.coli with 3-Indolepropionic acid Deposited 2017-12-08 Assembly 2 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain C 4–106（103 aa）
Chain D 4–106（103 aa）
Not recorded IOP INDOLYLPROPIONIC ACID × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.5；293 K；0.2 M Calcium Chloride 0.1 M HEPES pH7.5 30% PEG 4000
Resolution 2.13 Å R-free 0.229
6F7G Tryptophan Repressor TrpR from E.coli with 5-Methyltryptamine Deposited 2017-12-08 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 4–106（103 aa）
Chain C 4–106（103 aa）
Not recorded CVW 2-(5-methyl-1~{H}-indol-3-yl)ethanamine × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；293 K；0.2 Sodium Chloride 0.1 M HEPES pH7.5 25% PEG 3350
Resolution 1.66 Å R-free 0.226
6F9K Tryptophan Repressor TrpR from E.coli with 5-methyl-L-tryptophan as ligand Deposited 2017-12-14 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 1–107（107 aa）
Not recorded D0Q 5-methyl-L-tryptophan × 8 SO4 SULFATE ION × 8 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 4；293 K；0.1M Citric acid pH3.5, 2.4M Ammonium sulfate, pH4.0 cryo: +25% glycerol
Resolution 1.40 Å R-free 0.206
6FAL Tryptophan Repressor TrpR from E.coli with 3-Indolepropionic acid as ligand Deposited 2017-12-15 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 2–108（107 aa）
Chain B 2–108（107 aa）
Not recorded IOP INDOLYLPROPIONIC ACID × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 8.5；293 K；0.2M MgCl2 0.1M Tris HCl, pH8.5 30% PEG 4000
Resolution 1.20 Å R-free 0.179
6ST6 Crystal Structure of Domain Swapped Trp Repressor V58I Variant Deposited 2019-09-10 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 1–105（105 aa）
Mutation：V58I IPA ISOPROPYL ALCOHOL × 12 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；293 K；100 mM Na HEPES, 100 mM sodium chloride, 27.5-35%(v/v) isopropanol, pH 7.5
Resolution 2.05 Å R-free 0.311
6ST7 Crystal Structure of Domain Swapped Trp Repressor V58I Variant with bound L-trp Deposited 2019-09-10 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 1–105（105 aa）
Mutation：V58I TRP TRYPTOPHAN × 2 IPA ISOPROPYL ALCOHOL × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；293 K；100 mM Na HEPES, 100 mM sodium chloride, 27.5-35%(v/v) isopropanol, pH 7.5
Resolution 2.45 Å R-free 0.287

This page presents structural evidence recorded in PDB/mmCIF.“No recorded non-water small molecule” does not prove that the experimental sample was ligand-free; experimental conditions belong to the PDB experiment, while ligands and copy counts are shown for each biological assembly.